At the top of the Grand Col chair lift traverse lookers right under the mountain in from of you, called Aguille de St.Espirit until you reach a large open gully on this face. This is the hike up. In hard snow conditions you may need crampons. Climb this gully until you reach an obvious plateau on the right hand side, from here you can see the Mont Pourri glacier on the left. This is a great place to scope other potential missions, although everything over this side is glacier terrain.
The descent drops away in front of you, this is a SE facing slope so it a good idea to get their early morning if its warm weather. It is an wide open gully with lots of features, there is glacier terrain above you so be careful but in general this is a fun descent. Keep the St.Espirit mountains on your right as you have two options for getting out. The easiest of which is to cut right as soon as the Espirit mountain finishes and you will see the Mont Pourri Refuge in front of you....good place for a coffee and amazing view on the Bellcotte and over to Tignes. From the refuge you can skin back out to the grand col chair lift, on your left is the Lanchettes and on your right is the Aguille Du Espirit,its about an hours skin straight out of the valley. If you have time then it is a great idea to combing the Crete Des Lanchettes as access from the refuge is very easy.